1. craniospinal irradiation is useful in which of the following conditionmedulloblastomapilocyticastrocytomaoncocytomaoligodendrogliomaQuestion 1 of 20 2. The purpose and use of the panaromic image include all of the following except one. Which one is the exceptionTo evaluate impacted teethTo evaluate traumaTo examine extent of large lesionsTo evaluate and diagnose cariesQuestion 2 of 20 3. consistent radiographs requirefixed KVp and mAautomatic processinglong cone technique proper developingQuestion 3 of 20 4. It is acceptable for the operator to hold the film in a patient's mouth____.If the patient or parent grants permissionIf the patient is a childIf the patient has a handicapNeverQuestion 4 of 20 5. Cervical burnout is phenomenon seen inOcclusal cariesproximal cariesCervical thin enamelCervical cariesQuestion 5 of 20 6. Occlusal radiographs are useful for all of the following except one. Which one is the exception?When there is buccal-lingual expansion of the mandibleWhen there are sialoliths in the floor of the mouthFor views of the temporomandibular joint (TMJ)For displaying large segments of the mandibular archQuestion 6 of 20 7. at the atomic level x ray photons lose their energy throughspontaneous disintegration and mutation of photon energybremstrahlung interactionscompton and photoelectric processescollisions with other photonsQuestion 7 of 20 8. phosphorus-32 emitsx raysbeta particlesalpha particlesneutronsQuestion 8 of 20 9. Deterministic effects ____.Are seen only in the oral cavityShow a severity of response proportional to doseResult from particulate radiation such as alpha and beta particles but not xraysAre found after exposure to low levels of radiationQuestion 9 of 20 10. digital image in computerised radiography is made up ofCMOSsilver halide crystalsCCDpixelsQuestion 10 of 20 11. Size of x-ray film for bitewing used in a child for molar tooth3124Question 11 of 20 12. The function of the filament is toRelease photonsRelease electronsConvert photons into electronsConvert electrons into photonsQuestion 12 of 20 13. which of the following is not done as an investigation in osteosarcoma bone marrow biopsyMRI femurbone scanx ray chestQuestion 13 of 20 14. Penny test is used fordarkroom safe lightingStrength of developerPersonnel protectionStatic electricity artifactQuestion 14 of 20 15. sialogram of a normal salivary gland appears asleafy treesleafless treessialgectasiasialolithiasisQuestion 15 of 20 16. Normal angulation for recording a periapical radiograph of a maxillary lateral incisor:30 degrees70 degress40 degrees-ve 30 degreesQuestion 16 of 20 17. Hyperbaric oxygen is beneficial to the patients withSyphilisActinomycosisOsteoradionecrosisTubercular OsteomyelitisQuestion 17 of 20 18. A first-year dental student helping out in the clinic for the first time repeatedly obtains x-rays of tooth #14 with a zigzagged pattern. What could have prevented the zigzagged pattern on the radiographic image?Telling the patient not to move during the exposureUsing the film only once instead of exposing it multiple timesPlacing the film incorrectly with the lead portion facing the coneBending the film less when placing in positionQuestion 18 of 20 19. Which of the following is not a fibrotic effect of radiationVelopharyngeal incompetenceDysphagiaTrismusXerostomiaQuestion 19 of 20 20. Least radiation exposure occurs inArthrographyCT scanMRIOPGQuestion 20 of 20 Loading...
